Pulley



0. KEMBLE.

(Nu odel.

PULLEY.

Patented Feb. 12,1884.

'% ENTOR N. PEYR5. Plwwmhu n har, Washinglon, n. c.

Darren S rains Parent @rrreti.

CLAY KEMBLE, OF PHILADELPHIA, PENNSYLVANIA.

PULLEY.

SPECIFICATION formingpart of Letters Patent No. 293,255, dated February12, 1884.

Application filed November 8,1883. (N0 model.)

To all whom it may concern.-

Be it known that I, CLAY KEMBLE, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Pulleys, which improvementis fully set forth in the following specificationand accompanyingdrawings, in which Figure 1 is a side elevation of a pulley embodying myinvention. Fig. 2 is a section in line m 00, Fig. 1. Figs. 3 and 4 areviews of the interior thereof, and Fig. 5 shows the method of making thesegments of the pulley.

Similar letters of reference indicate corre-v A sponding parts intheseveral figures.

My invention consists of a, pulley having its peripheral portion formedof segments of wood, each having its grain exposed, or extendedradially, so that the chain, cable, rope, uc., comes in contact with thesegments at a right angle to the grain, thus increasing the strength,durability, and grip of the pulley.

It further consists of means for securely connecting the segments of apulley with the heads thereof.

It also consists of the construction of the heads of the pulley, wherebythey firmly sustain the peripheral segments and prevent projection ofthe fastening bolts and nuts, as will be hereinafter stated.

Referring to the drawings, A represents the heads. of the pulley; B, theperipheral portion formed of segments 0, and D D the fastening bolts andnuts. The heads are formed separate of suitable metal, and the segmentsof pieces of wood out with thegrain, so that the grain is presented orexposed at the periphery of the pulley, and the segments may be said tobe truncated, so that their inner'ends abut against the collars E 011the inner faces of the heads A, it being seen that the segments arefitted between said heads, and the collars are polygonal or have manyfaces, to accord with the number of segments employed. On opposite sidesof the segments are grooves a a, which enter ribs or tongues 22 on theinner faces of the heads,near the periphery thereof,

said tongues and grooves extending parallel with the faces of thecollars E. 'The parts of the outer faces of the collars surrounding thehub portions are depressed or countersunk, as at F, and in the walls ofsaid parts, and in .ble, rope, &c.,

the collars E are openings or slots 0, through which, in the directionparallel with the shaft to which the pulley is fitted, are passed thefastening-bolts D, the nuts D whereof tighten against the wall of one ofthe parts F, and the heads of the bolts bear against the wall of theopposite part, it thus being seen that said nuts and heads do notproject outside of the widest part of the pulley, but are retainedwithin the spaces formed by the depressions or countersinks F andprevented from being struck or interfering with the free rotation of thepulley. It will also be seen that when the nuts D are properly tightenedthe segments are firmly clamped between the heads, and as they abutagainst the inner collars of said heads and against each other, andareinterlocked by the tongues b with the heads, they are securelyconnected with said heads without liability to displacement. As thegrain of the wood of the segments is exposed or presented at theperiphery of the pulley, it is evident that the segments have in creasedwearing qualities, and are well enabled to endure the strain and severeusage to which they are subjected by the chain, ca-

running over or around the pulley.

\Vhen a segment is broken or worn, it may be readily removed byloosening the heads without materially disturbing the other segments,then replaced, and the heads again tightened.

The segments may beformed of a piece of wood cut with the grain, groovedon opposite sides, divided into sections of proper shape with diagonalends, the sections or lengths being fitted between clamps or heads andsuitably turned.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A pulley having the grain running radially; and a peripheral portionformed of segmental pieces of wood, each having the grain exposed at theperiphery, substantially as and for the purpose set forth.

2. A pulley having separate heads with collars on the inner facesthereof, sections or seg- IOO inents fitted between the heads around thecollars thereof, and clamping bolts and nuts,said

bolts being passedthrough the heads parallel with the supporting-shaft,substantially as and I inner faces,a peripheral portion formed of segforthe purpose set forth. ments or sections ofwood with grooved sides, 3.Apulley having separate heads, the outer and clamping-bolts passedthrough the sepafaces whereof are depressed or countersunk, rate heads,and provided with nuts the parts 5 and clamping bolts and nuts, theheadsof said I being combined and operating as described, 15

bolts and nuts occupying positions in the forming an improvement inpulleys.

spaces formed by said depressions substan- CLAY KEMBLE. tially as andfor the purpose set forth. Vitnesses:

4. Separate heads with depressions on their J oI-IN A. 'WIEDERsHEIM, IOouter faces and collars and tongues on their A. P. GRANT.

r A i It is hereby certified that in Letters Patent No. 293,255, grantedFebruary 12, .1884, upon the application of Clay Kelnble, ofPhiladelphia, Pennsylvania, for an improvement in Pulleys, an errorappears in claim 1 of the printed specification, requiring correction asfollows: The words the grain running radially, and, in lines 95 and 96,should be omitted and the same read after the Word having in line 97;and that the Letters Patent should be read with this correction thereinto make it conform to the record of the case in the Patent Ofiice.

Signed, countersigned, and sealed this 11th day of March, A. I). 1884.

[SEAL] M. L. JOSLYN,

Acting Secretary oft/1c Interim".

Patent No. 293,255,

' Oountersigned:

BENJ. BUTTERWORTH,

(lmnir g 'iss'ioner of Patents.

